ARM: configs: stm32: Clean STM32 defconfig

Running make savedefconfig highlights some useless flags.

Since 54a48aa3d558 ("Compiler Attributes: remove CONFIG_ENABLE_MUST_CHECK")
flag ENABLE_MUST_CHECK has been removed.

Since 35260cf ("Kconfig.debug: fix SCHED_DEBUG dependency")
SCHED_DEBUG depends on DEBUG_KERNEL and PROC_FS.
As PROC_FS is not set, SCHED_DEBUG reference can be removed.

Since 7801104 ("scsi: bsg: Move bsg_scsi_ops to drivers/scsi/")
BLK_DEV_BSG depends on SCSI. As SCSI is not set, BLK_DEV_BSG reference
can be removed.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20241220125506.3157268-3-patrice.chotard@foss.st.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/stm32_defconfig

@@ -12,7 +12,6 @@ CONFIG_BASE_SMALL=y
 # CONFIG_SIGNALFD is not set
 # CONFIG_EVENTFD is not set
 # CONFIG_AIO is not set
-# CONFIG_BLK_DEV_BSG is not set
 # CONFIG_MMU is not set
 CONFIG_ARCH_STM32=y
 CONFIG_CPU_V7M_NUM_IRQ=240
@@ -72,10 +71,8 @@ CONFIG_NLS=y
 CONFIG_CRC_ITU_T=y
 CONFIG_CRC7=y
 CONFIG_PRINTK_TIME=y
-# CONFIG_ENABLE_MUST_CHECK is not set
 # CONFIG_DEBUG_BUGVERBOSE is not set
 CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
 CONFIG_MAGIC_SYSRQ=y
 # CONFIG_SLUB_DEBUG is not set
-# CONFIG_SCHED_DEBUG is not set
 CONFIG_CRYPTO=y